the "Victory" copper QEV rifle

Cannons powered by pneumatic pressure (compressed gas) using a valve or other release.
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How is it?

pretty good
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so so
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just darn ugly
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just darn ugly
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Total votes: 0
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Hotwired
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origin unknown wrote:
Hotwired wrote:Did you bore out the tees to get the barrel and chamber through them?
Yep, sure did.
What with?
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Hawkeye
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I use a chainsaw file to remove the stops in copper couplers. Quick and easy and the inside can be polished with a flap sander.
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origin unknown
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Hotwired wrote:
origin unknown wrote:
Hotwired wrote:Did you bore out the tees to get the barrel and chamber through them?
Yep, sure did.
What with?
A cylindrical file, and some ultra fine grit sandpaper to smooth it out.
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Hotwired
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o.0

That must've taken forever if they're made the same way as the one here are - a thicker middle section to block pipe going further in.

I took a couple of looks at how thick the middle copper section was and considered how long it would take to file away and cut it out instead :P
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origin unknown
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Hotwired wrote:I took a couple of looks at how thick the middle copper section was and considered how long it would take to file away and cut it out instead :P
I thought the exact opposite, thinking that it would be easier to file away rather than cut.
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hi
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how fast do you think this shoots? i know in the original post you said you didnt know, but could you give me a rough estimate?
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origin unknown
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Carrots dont weigh much. It probably shot the carrot at 140-250fps.
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Novacastrian
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Just saw this cannon, very nice copper cannon :)
Is it limited to 200psi because of the sprinkler valve? One more thing, why no damage pics yet?
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cwazy1
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^^ im pretty sure its a qev.
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Ragnarok
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Novacastrian wrote:Is it limited to 200psi because of the sprinkler valve?
Well, as cwazy has pointed out, it's a QEV.
Most QEV valves will happily go much higher than that, probably a limitation from the source is more likely.
Does that thing kinda look like a big cat to you?
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MrCrowley
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Those QEV's are only rated for 150psi, like a sprinkler I doubt they would go a whole lot higher past 200psi.
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VH_man
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Havent people on this forum used QEV's past 250?

Im sure they can take more than 150, they are made out of solid aluminum!!!!!
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Hotwired
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Its mainly to do with how tough the sealing material is.

The metal body is highly unlikely to fail but the piston/diaphragm in QEVs are made of rubber or rubbery plastic and thats what'll give way first.

Some which are sold at 150psi are used at 300psi.
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nivekatoz
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That thing is cool!!!!!!! You should find a barrel that is thicker,like a brass pipe nipple...You can find custom sizes on plumbingsupply.com or onlinemet***.com....I would give you the rest of the email address but I got in trouble last time I recommended a site....other wise its cool..I was thinking of making a gun using a qev,but I was not sure how they worked...I was thinking they worked like solenoid valves somewhat????
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origin unknown
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I accidentally ruined the QEV that I used in this cannon and bought a new QEV. Here is the link to the cannon I made with the new QEV: http://www.spudfiles.com/forums/wwr-win ... t9985.html
The new QEV is like the kind Hotwired was saying that can take 300psi(Ragnarok's HEAL cannon) even though its rated to 150psi.
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